Bag connector

ABSTRACT

The present invention concerns an attachable membrane device for providing a piercable liquid barrier membrane to the surface of a pierceable fluid container, such as an infusion bag. The attachable membrane device have a fastening part comprising a fastening surface adapted to be attached to the surface of the pierceable fluid container and thereby provide a liquid tight seal between the fastening surface and the surface of the pierceable fluid container. Additionally, the attachable membrane device is further provided with a barrier membrane part, adapted to provide a liquid tight seal after penetration by a piercing member. Connection means is arranged to the attachable membrane device. The invention simplifies the injection or withdrawal of a fluid in a pierceable fluid container.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a National Stage application under 35 U.S.C. §371and claims the benefit under 35 U.S.C. §119(a) of InternationalApplication No. PCT/SE2007/050657, having an International Filing Dateof Sep. 17, 2007, which is incorporated herein in its entirety.

TECHNICAL FIELD

The present invention relates to an attachable membrane for injection offluid into a pierceable fluid container, or the withdrawal of fluidtherefrom.

BACKGROUND OF THE INVENTION

Within several applications it is required to transfer pharmaceuticalsor medicaments into a fluid container such as an infusion bag. Usuallysuch infusion bags are filled with a transport liquid such as salinesolution or glucose solution in order to simplify the drug preparationof such an infusion bag. Infusion bags are generally equipped with aninjection port to provide medicaments and a piercing port to extract thefluid from the infusion bag to an infusion system and thereafter usuallyto a patient. These pre-manufactured ports on the infusion bags makethem less flexible for use together with other injection devices.Manufacturing fluid containers having predetermined injection andextraction ports is also complicated in the sense that it addsmanufacturing steps to the manufacturing of the fluid container itself.

One way of partly overcoming these drawbacks is described in thepublication of WO 94/13247. The document describes a valve devicecomprising a valve body with a barrier membrane and a surroundingportion. The valve device has an adhesive surface located at theunderside of the valve body to attach the valve body to the surface ofan infusion bag. The valve device is manufactured in one piece of thesame material and its main purpose is to be applied and handled on theoccasion of use while retaining aseptic conditions even by persons ofimpaired sight. However even for persons with good sight the describedsolution may have drawbacks. Although allowing for any piercing memberto be inserted through the membrane the document is completely silentabout the drawback that the inserted piercing member may tear, rip, oreven puncture the fluid container unless the user is cautious whenhandling the piercing member.

The publication of WO 82/03776 describes one way of trying to solve arelated problem. The publication discloses a device for providing abarrier membrane to the surface of a flexible fluid container. Thebarrier membrane is adhered to the surface by an adhesive. Additionallythe barrier membrane may be arranged with a flexible tube attached to acylindrical casing. At the other end of the tube, the tube may betightly connected to a holder for a hollow syringe needle. The syringeneedle is surrounded by the tube which is slideable arranged to thesyringe needle and is further provided with an arresting shoulder. Thearresting shoulder of the syringe needle is in turn connected toconnection means of a conventional type for a liquid conduit. The lengthof the tube is adapted such that its rear end rests against the holderof the syringe needle. When the needle is inserted the tube will also beinserted into the fluid container for as far as the arresting shoulderallows. The described solution provides for a rather complicatedmechanism having moving parts for introducing or withdrawing a liquidinto a flexible fluid container. There is a need for simpler solutionswhich maintain or even improve the safety of the process.

SUMMARY OF THE INVENTION

It is an object of the present invention to at least partly provide asolution to the above mentioned problems. It is further an object of thepresent invention to provide a simple attachable barrier membrane devicewhich allows the user to safely introduce or withdraw liquid from apierceable fluid container. The present objectives are achieved by anattachable membrane device for providing a pierceable liquid barriermembrane at the surface of a pierceable fluid container, such as aninfusion bag, i.e. immediately adjacent to the surface of the pierceablefluid container or in the vicinity of said surface. The attachablemembrane device have a fastening part comprising a fastening surfaceadapted to be attached to the surface of the pierceable fluid containerand thereby provide a liquid tight seal between the fastening surfaceand the surface of the pierceable fluid container. The attachablemembrane device is further provided with a barrier membrane part adaptedto provide a liquid tight seal after penetration by a piercing member.The attachable membrane device is further arranged with connection meansto connect and lock a piercing member device to the attachable membranedevice from movement in a direction substantially longitudinal with thepiercing member. The solution provides for a simple and directconnection to the barrier membrane onto which an injector or similar maybe attached. The connection means also allows for a user to actually letgo of a piercing member device after assembly with the attachablemembrane device, allowing the user to perform other tasks e.g. nursing.Additionally, the connection means provides a grip for the user, whichmay be utilized when attaching the attachable membrane device to thefluid container.

The barrier membrane part and the fastening part may be separate partsarranged to be attached to each other. This embodiment is particularlyadvantageous when the fastening part needs specific properties or whenthe barrier membrane needs to have more pronounced sealing properties.The barrier membrane part and the fastening part may be integrallyformed from one material. Such an embodiment may be advantageous from amanufacturing perspective since it allows for the manufacturing of thefastening part and the barrier membrane part in one step by e.g.moulding. The material used in this embodiment is chosen so as toprovide for sufficient sealing properties while still impart sufficientstrength to the fastening part. Preferably such embodiments are madefrom thermoplastic elastomers.

In one embodiment of the present invention the fastening surface isarranged with an adhesive to fasten the fastening part to the pierceablefluid container and thereby also provide for the liquid tight sealbetween the fastening surface and the pierceable fluid container.Although adhesive may be applied separate to the surface of thepierceable fluid container in order to attach the attachable membrane itis preferred that the fastening surface is provided with a binder suchas an adhesive. Additionally such thin layer of adhesive may be providedwith a protective layer preferably a silicone based release layer whichis easy to peel off before attaching the barrier membrane device to thesurface of the pierceable fluid container.

In a preferred embodiment of the present invention the connection meanscomprises a neck element having at least one guiding means, preferablytwo or more, to guide a piercing member device to a locked position.Preferably the neck element comprises two guiding means having the formof guiding grooves which during assembly with a piercing member deviceguide the piercing member device to a locked position. Usually such apiercing member device may be in the form of an injector. Once in thelocked position the piercing member device is prevented from movement ina direction perpendicular to the fastening surface of the attachablemembrane device.

In another embodiment of the present invention the fastening part of theattachable membrane device is arranged with a fluid channel extendingfrom the fastening surface to the barrier membrane part. Such fluidchannel has the main purpose of allowing a piercing member that isdisplaceable with respect to the locked piercing member device, such asa needle, to freely run through the fastening part without the need ofpenetrating any matter, except for the barrier membrane part, beforepiercing the fluid container. The embodiment simplifies the insertion ofa piercing member while at the same time preventing the piercing memberdevice from disengagement from the attachable membrane device.

In another embodiment of the present invention, the fastening part maycomprise a compression volume. The compression volume may be arranged atthe end of the fluid channel at the fastening surface of the fasteningpart. The compression volume is generally a substantially hollow spacewithin the fastening part, or at least partly within the fastening part,which will allow the fastening part to be slightly more compressible.The fastening part may be provided with at least one compression volume,at least two compression volumes or at least three compression volumes.It may be arranged as above, in the proximity of the fastening surfacebut it may also be arranged at the proximity of the side edge of thefastening part or fully inside the fastening part. This enables apiercing function to the attachable membrane device without actuallypenetrating the fluid container by means of the piercing member deviceitself. Instead the actual piercing of the fluid container will takeplace after assembly with the piercing member device when the fasteningpart is compressed by a user. After compression the fastening part ispreferably restored to its original shape and the piercing member isretracted back from the pierceable fluid container. Fluid may then beinjected to the fluid container (or withdrawn). The compression volumewill temporarily get filled with the fluid during this action. Leakageis effectively prevented by the liquid tight seal provided by thebinding substance, e.g. an adhesive.

A piercing device may be attached to the connection means. Embodimentsof the present invention having piercing devices are advantageous incombination with at least one compression volume. The piercing member ofthe piercing device is equipped with a piercing tip to pierce thepierceable fluid container. The piercing device may be either anintegrated part of the connection means as illustrated in FIG. 3 or aseparate part attached to the connection means (not shown). Anarrangement like this allows for the attachable membrane device itselfto actually pierce the fluid container rather than letting an attachedpiercing member do this. Preferably the piercing tip stretches from thecompression volume into the fluid channel, this will prevent anymaterial from being punched out, i.e. stamped out. Instead an openingwill be formed having a tongue-shaped lid. This will secure theformation of a proper hole independently of the type of piercing memberused.

In an additional embodiment of the present invention the connectionmeans comprise a rigid material such as a rigid polymeric material. Thisallows for a sturdy connection with a piercing member device. Incombination, or not, the fastening part may comprise a flexiblematerial. By making the fastening part with a flexible material the riskof inducing damage to the fluid container is less as would otherwise bethe case. Further will a force absorbing property be achieved. Thefastening part may however comprise a rigid material such as a rigidpolymeric material. This is especially advantageous when the connectionmeans and the fastening part is constructed from the same material, i.e.when the fastening part and the connection means are integrally formedfrom one material. Preferably such an embodiment is formed byinjection-moulding.

In one embodiment of the present invention a separate force absorbingmaterial is arranged between the connection means and the fasteningpart. Such force absorbing material preferably comprises flexiblematerial and is especially useful when the connection means and thefastening part are made of rigid material.

When a separate barrier membrane is used to create the barrier membraneproperties, the separate barrier membrane is preferably attached in aslightly compressed state to the connection means. This can be done e.g.by means of the attachment method. The advantage of such an embodimentis that a piercing member of a relative large diameter can be used sincethe barrier membrane will flex back due to the compression. The barriermembrane is preferably compressed in the radial direction when weldingthe membrane to the connection means. The barrier membrane may as wellbe compressed in the direction in which the piercing member is intendedto penetrate the barrier membrane, i.e. in a direction towards thecentre of the pierceable fluid container.

DEFINITIONS

With the term “piercing member” is meant a needle or a needle likeobject or a hollow tube like object which is intended to pierce anotherobject such as a membrane or similar for the purpose of transferring afluid (liquid, gas or combinations thereof).

With the term “piercing member device” is meant any device onto which apiercing member may be arranged, e.g. an injector or a syringe or thelike.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be described in greater detailed withreferral to the following figures wherein;

FIG. 1 shows a cross section of a first embodiment of the presentinvention wherein the connection means and the fastening part are madefrom the same material.

FIG. 2 shows a cross section of a second embodiment of the presentinvention wherein connection means and the fastening part are made fromdifferent material.

FIG. 3 shows a cross section of a third embodiment of the presentinvention having a piercing device.

FIG. 4 shows the present invention in perspective.

FIG. 5 shows a cross section of an embodiment of the present inventionafter assembly with a piercing member device.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

Referring to FIG. 1, FIG. 1 shows an attachable membrane device 101according to the present invention for providing a pierceable liquidbarrier membrane to the surface of a pierceable fluid container 104,such as an infusion bag. Said attachable membrane device has a fasteningpart 102 comprising a fastening surface 103 adapted to be attached tothe surface of a pierceable fluid container 104 and thereby provide aliquid tight seal between the fastening surface 103 and the surface ofsaid pierceable fluid container 104. The attachable membrane device 101is further provided with a barrier membrane part 105 adapted to providea liquid tight seal after penetration by a piercing member. Theattachable membrane device 101 is further arranged with connection means110 to connect and lock a piercing member device to the attachablemembrane device 101.

The fastening surface 103 may be equipped with a thin layer of a bindersuch as an adhesive 103 a. In the shown embodiment of the presentinvention the fastening part 102 can be said to comprise at least afirst and a second fastening part section 102 a, 102 b. The firstfastening part section 102 a is specifically arranged to adapt themembrane device 101 to be used with piercing members having a determinedwork length. By the term determined work length it is meant that thelength of the piercing member correlates to the length of the firstfastening part section 102 a so that only a pre-determined length of thepiercing member can be inserted into the pierceable fluid container. Thesecond fastening part section 102 b is specifically arranged to create arelatively large fastening surface 103.

In the illustrated embodiment of the present invention the firstfastening part section 102 a has a diameter d_(a) which is onlyapproximately 20% of the diameter d_(b) of the second connection section102 b. The first fastening section 102 a has further a concave form toexplicitly form a force absorbing part 106 on the fastening part 102.The force absorbing part 106 is formed in that part of the firstfastening section 102 a with the smallest diameter. The force absorbingpart 106 allows for the fastening part 102 to absorb some of the forcesthat it is subjected to it by means of the connected fluid container ora user. Such forces may occur during or after connection. The purpose isto absorb forces acting on the attachable membrane device from thepierceable fluid container to reduce the risk of the attachable membranedevice detaching from the surface 104 of the pierceable fluid container.

It has also been found that it is advantageous to have a flexible outerrim 107 on the second fastening part section 102 b. By having a flexibleouter rim the fastening part 102 is effectively prevented, to a certainextent, from causing harm to the pierceable fluid container when e.g.bending forces are applied to the attachable membrane device. Such aflexible outer rim 107 is preferably made from the same material as thefastening part 102 itself, however, in such case the thickness of therim is small enough to provide for an acceptable flexibility. Asindicated above the flexible outer rim 107 can be made from a differentmaterial than the fastening part 102.

In FIG. 1 the fastening part 102 is equipped with a barrier membranepart 105 which provides for a liquid, and preferably gas tight sealaround a piercing member during and after the pierceable fluid containerhas been pierced by a piercing member, such as a needle. The barriermember part 105 may be formed as an integral part of the fastening part102 when the fastening part 102 is made of appropriate material. Thebarrier member part 105 can also be formed by a separate piece ofmaterial, e.g. when the fastening part 102 is made of a rigid materialor when a specific material quality is required for the barrier memberpart 105. Alternatively, as illustrated in FIG. 2 the barrier membranepart may however not be arranged on the fastening part 102 but as shownon a part forming the connection means 210.

A fluid communication channel 109 arranged in the center of thefastening part 102 extends from the fastening surface 103 to the barriermembrane part 105. The fluid channel 109 is adapted to provide a channelfor a piercing member which may be inserted through the channel topierce the pierceable fluid container. Although a fluid channel is not anecessary feature of the present invention it is preferable since itwill simplify the insertion of a piercing member since a piercing memberonly needs to penetrate the barrier member part 105 and not the whole ofthe fastening part in order to reach the surface 104 and thereafter theinterior of the pierceable fluid container.

In some embodiments of the present invention the fluid channel does notneed to extend the whole way from the barrier membrane to the fasteningsurface. It may well be that the fluid channel ends just above thefastening surface so that a second barrier membrane is created by meansof the fastening part. Hence more generally, the attachable membranedevice may be equipped with two barrier membranes in order to provide asecure liquid tight seal around the piercing member so as to preventleakage of fluid. The fluid channel is in such an embodiment arrangedbetween a first and a second barrier membrane.

As mentioned the attachable membrane device 101 comprises connectionmeans 110 to connect and lock a piercing member device 550 to theattachable membrane device 101. Such piercing member device 550 may forinstance be an injector assembly such as described in US 2003/0070726 A1or e.g. as described in WO 2004/004806 (injection component 29). In anycase the connection means 110 may comprise a cylindrical neck element111 as described in greater detail in EP 1,434,549 A1 (in combinationwith a fluid container). The neck element 111 is in the currentembodiment of the present invention equipped with two guiding members inwhich corresponding guiding means on the piercing member device mayenter to connect and lock the piercing member device 550 to theconnection means 110 and the attachable membrane device 101.

In the embodiment of the present invention shown in FIG. 1 the fasteningpart 102 and the connection means 110 are integrally formed from onematerial.

In FIG. 2 an attachable membrane device 201 for providing a pierceableliquid barrier membrane at the surface of a pierceable fluid container,such as an infusion bag, according to the present invention. Saidattachable membrane device 201 has a fastening part 202 comprising afastening surface 203 adapted to be attached to the surface of apierceable fluid container 204 and thereby provide a liquid tight sealbetween the fastening surface 203 and the surface of said pierceablefluid container 204. The fastening surface 203 may be equipped with athin layer of a binder such as an adhesive 203 a. The attachablemembrane device 201 is further provided with a barrier membrane part 205adapted to provide a liquid tight seal after penetration by a piercingmember. The attachable membrane device 201 is further arranged withconnection means 210 to connect and lock a piercing member device to theattachable membrane device 201.

The attachable membrane device 201 is shown having a fastening part 202with a first fastening part section 202 a and a second fastening partsection 202 b. The connection means 210 similar to the one describedwith respect to FIG. 1, however, it is formed from a separate piece ofmaterial with respect to the fastening part 202. A cylindrical neckelement 211 is equipped with two guiding members in which correspondingguiding means on a piercing member device may enter to connect and locka piercing member device to the connection means 210 and the attachablemembrane device 201. The connection means 210 further comprise an anchorelement 212 onto which the fastening part 202 has been moulded, althoughother fastening methods may be used such as adhesive. In this embodimentthe connection means 210 is formed to be rigid or formed from a rigidmaterial in order to securely connect and lock a piercing member device.

The fastening part 202 may be formed from a flexible material such as arubber-like material e.g. natural rubber, styrene rubber, urethanerubber or the like. Other suitable material may be thermoplasticelastomer (TPE) based on e.g. styrene, olefin, urethane, esters oramides. Any functional mixture of the above may also be suitable.

The connection means 210 is suitably formed to be rigid; preferably theconnection means 210 is formed from a thermoplastic material such aspolyethylene, polypropylene, polystyrene, polyurethane, polyvinylchloride or the like. The connection means 210 may also be formed of athermosetting plastic material such as epoxide esters (EP) or any othersuitable thermosetting plastic material.

Further illustrated in FIG. 2 is a membrane barrier 205 (having exactlythe same purpose as the barrier membrane describe earlier in the textrelating to FIG. 1) which is attached to the connection means 210. Afluid communication channel 209 is arranged preferably in the center ofthe connection means 210 through which a piercing member of a piercingmember device may be inserted. The fluid communication channel 209extends from the barrier membrane 205 to the fastening surface 203.

In another embodiment of the present invention at least one compressionvolume 220 is arranged at the end of said fluid channel at the fasteningsurface 203 of said fastening part 202. The main purpose of suchcompression volume 220 is to allow for the fastening part 202 to flex inthe longitudinal direction of an attached piercing member. It is alsopossible that the compression volume is located elsewhere as long as itprovides for the intended function of allowing the fastening part 202 tobe compressed. The feature allows for a piercing member to pierce apierceable fluid container by simply compressing the attachable membranedevice after a piercing member device has been connected and locked ontothe attachable membrane device. When using this embodiment of thepresent invention it is not necessary that such piercing member ismaintained inside the pierceable fluid container, it is enough that thepiercing member makes a hole in the surface 204. Any fluid which isinserted into the pierceable fluid container may be temporarilymaintained inside the compression volume 220 due to the liquid tightseal effectively provided for between the fastening surface 203 and thesurface 204 of the pierceable fluid container before it is forced intothe fluid container e.g. by pump means used by the user. The barriermembrane 205 prevents any such liquid from escaping out from the fluidcommunication channel 209.

FIG. 3 shows an attachable membrane device 301 according to the presentinvention for providing a pierceable liquid barrier membrane at thesurface of a pierceable fluid container, such as an infusion bag. Theattachable membrane device 301 has a fastening part 302 comprising afastening surface 303 adapted to be attached to the surface of apierceable fluid container 304 and thereby provide a liquid tight sealbetween the fastening surface 303 and the surface of the pierceablefluid container 304. The fastening surface 303 may be equipped with athin layer of fastening means such as an adhesive 303 a. The attachablemembrane device 301 is further provided with a barrier membrane part 305adapted to provide a liquid tight seal after penetration by a piercingmember. The attachable membrane device 301 is further arranged withconnection means 310 to connect and lock a piercing member device to theattachable membrane device 301.

In the shown embodiment in FIG. 3 the connection means 310 comprise ananchor element 312 onto which the fastening part 302 has been moulded.The anchor element 312 may further be equipped with a piercing device313. It is well within the boundaries of the present invention that theanchor element 312 and the piercing device 313 are the same, i.e. thefastening part may be moulded (or fastened in any other way) directlyonto the piercing device 313, in such case the piercing device 313itself can be considered to be an anchor element. The piercing device313 may be formed from a cylinder shaped, rigid material, preferablyformed integrally from one piece of material with the connection means310 when the connection means 310 is formed of a rigid material. Thepiercing device further comprises a piercing tip 314 which may be formedby cutting the piercing device 313 at an angle or more preferably bymoulding the piercing device directly to have such a form. The piercingdevice 313 extends from the anchor part 312 into a compression volume320 via a short fluid communication channel 309. The compression volume320 is arranged at the fastening surface 303 of said fastening part 302.The main purpose of such compression volume 320 is to allow for thefastening part 302 to flex in the longitudinal direction of an attachedpiercing member (in principle perpendicular to the surface 304 of thepierceable fluid container). This allows for the piercing device topierce a pierceable fluid container upon compression of the attachablemembrane device. After piercing the surface of the pierceable fluidcontainer 304 the piercing member does not need to be inserted into thefluid container in order to effectively transfer fluid via theattachable membrane device since fluid may be inserted without lossesdue to the liquid tight seals provided for by the sealing between thesurface of the fluid container 304 and the fastening surface 303 as wellas the sealing provided for by the barrier membrane 305.

The piercing tip 314 preferably extends into the fluid channel 309 asillustrated in FIG. 3. This configuration prevents a piece of materialfrom being punched out from the surface 304 of the pierceable fluidcontainer, instead a tongue-shaped, or horse-shoe shaped, lid is formedby the opening through which the fluid may be inserted, since the innersurface 315 of the compression volume 320 will effectively prevent thepiercing device 313 from penetrating too far below the surface 304 ofthe fluid container. By having a lid formed next to the opening insteadof punching a hole on the surface 304 of the pierceable fluid container,no loose material will contaminate the fluid inside the pierceable fluidcontainer.

FIG. 4 shows an embodiment of the present invention having connectionmeans 410 to connect and lock a piercing member device (as seen in FIG.5) to the attachable membrane device 401. The connection means 410comprises a cylindrical neck element 411. The neck element 411 is in thecurrent embodiment of the present invention equipped with two guidingmembers 412, 413 which will guide corresponding guiding means on thepiercing member device to connect and lock the piercing member device tothe connection means 410 and the attachable membrane device 401. Theguiding members 412, 413 both lock the corresponding guiding means onthe piercing member device at a lock position 414, 415.

Alternative, the connection means, to connect and lock a piercing memberdevice from movement in a direction substantially longitudinal with thepiercing member, may be in the form of a male connection part (notshown). However such male connection part must be equipped with alocking flange, preferably a circumferential locking flange, so that anyconnecting fluid container or coupling device can lock to said lockingflange in order to prevent movement in a direction substantiallylongitudinal with the piercing member.

Further illustrated is a fastening part 402 having a first fasteningpart section 402 a with a diameter d_(a) which is only approximately 20%of the diameter d_(b) of the second connection section 402 b. Thefastening part 402 has a concave form to form a force absorbing sectionon the fastening part 402. A thin layer of adhesive 403 a is shownattached to a fastening surface 403.

FIG. 5 shows another attachable membrane device 501 having a fastenersurface 503, according to the present invention in combination with apiercing member protection device 550 after assembly. The attachablemember device 501 has been attached to the surface of a pierceable fluidcontainer 504 with a thin layer of adhesive 503 a which has been appliedto the surface 504 just before attachment, as a preferred alternative,the adhesive layer may be applied in advance on the fastening surface503 as described earlier. The fastening surface 503 has thereby beenpressed against the adhesive to attach the attachable membrane device501. The piercing member protection device 550 is shown in a securedposition, i.e. the piercing member has not yet pierced the pierceablefluid container surface 504.

The invention claimed is:
 1. An attachable membrane device for providinga pierceable liquid barrier membrane at the surface of a pierceablefluid container, wherein said attachable membrane device comprises afastening part comprising a first fastening part section having a lengththat correlates to a pre-determined length of a piercing member and asecond fastening part section comprising a fastening surface adapted tobe attached to the surface of said pierceable fluid container, therebyproviding a liquid tight seal between said fastening surface and thesurface of said pierceable fluid container, a barrier membrane partadapted to provide a liquid tight seal after penetration by a piercingmember wherein said fastening part is arranged with a fluid channelstretching from the fastening surface to said barrier membrane part, anda connector configured to substantially lock a piercing member device tosaid attachable membrane device from movement in a directionsubstantially longitudinal with said piercing member.
 2. The attachablemembrane device according to claim 1, wherein said barrier membrane partand said fastening part are separate parts arranged to be attached toeach other.
 3. The attachable membrane device according to claim 1,wherein said barrier membrane part and said fastening part areintegrally formed from one material.
 4. The attachable membrane deviceaccording to claim 1, wherein said fastening surface comprises anadhesive to fasten said fastening part to said pierceable fluidcontainer, thereby providing for said liquid tight seal between saidfastening surface and said pierceable fluid container.
 5. The attachablemembrane device according to claim 1, wherein said connector comprises aneck element having at least one guide to guide said piercing memberdevice to a lock position.
 6. The attachable membrane device accordingto claim 5, wherein said neck element comprises two guides having theform of guiding grooves.
 7. The attachable membrane device according toclaim 1, wherein said fastening part further comprises a compressionvolume arranged at the end of said fluid channel at the fasteningsurface of said fastening part.
 8. The attachable membrane deviceaccording to claim 1, wherein said connector is arranged with a piercingdevice having a piercing tip to pierce said pierceable fluid container.9. The attachable membrane device according to claim 7, wherein saidconnector is arranged with a piercing device having a piercing tip topierce said pierceable fluid container, and wherein said piercing tipextends from said compression volume into said fluid channel.
 10. Theattachable membrane device according to claim 1, wherein said connectorcomprises a rigid material.
 11. The attachable membrane device accordingto claim 1, wherein said fastening part comprises a flexible material.12. The attachable membrane device according to any claim 11, whereinsaid flexible material is more flexible than the material from whichsaid connector is formed.
 13. The attachable membrane device accordingto claim 2, wherein said fastening part comprises a rigid material. 14.The attachable membrane device according to claim 13, wherein saidfastening part and said connector are integrally formed from onematerial.
 15. The attachable membrane device according to claim 14,wherein said fastening part and said connector are formed byinjection-moulding.
 16. The attachable membrane device according toclaim 1, wherein said attachable membrane device comprises at least twobarrier membranes of different material.
 17. The attachable membranedevice according to claim 1, wherein said connector is a male connectionpart comprising a locking flange.
 18. The attachable membrane deviceaccording to claim 10, wherein said rigid material is a rigid polymericmaterial.
 19. The attachable membrane device according to claim 13,wherein said rigid material is a rigid polymeric material.